/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_20x0-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 05:44:42,542 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 05:44:42,549 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 05:44:42,561 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-20 05:44:42,571 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 05:44:42,572 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 05:44:42,573 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 05:44:42,574 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 05:44:42,574 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 05:44:42,576 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 05:44:42,578 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 05:44:42,580 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 05:44:42,582 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 05:44:42,583 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 05:44:42,584 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 05:44:42,585 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 05:44:42,588 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 05:44:42,598 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 05:44:42,599 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 05:44:42,599 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 05:44:42,600 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 05:44:42,627 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 05:44:42,628 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 05:44:42,630 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 05:44:42,631 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 05:44:42,631 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 05:44:42,631 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 05:44:42,631 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 05:44:42,632 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 05:44:42,632 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 05:44:42,632 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 05:44:42,632 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 05:44:42,632 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 05:44:42,632 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 05:44:42,633 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 05:44:42,633 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 05:44:42,633 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 05:44:42,635 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 05:44:42,635 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 05:44:42,635 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 05:44:42,635 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 05:44:42,636 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 05:44:42,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 05:44:42,636 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 05:44:42,637 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 05:44:42,637 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 05:44:42,637 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 05:44:42,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 05:44:42,638 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 05:44:42,638 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 05:44:42,638 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 05:44:42,928 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 05:44:42,944 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 05:44:42,947 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 05:44:42,948 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 05:44:42,949 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 05:44:42,949 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_20x0-2.c [2020-07-20 05:44:43,021 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09d262daa/c224c7647cdc41df8575be01c2977bff/FLAG0f0cc22cb [2020-07-20 05:44:43,497 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 05:44:43,498 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_20x0-2.c [2020-07-20 05:44:43,504 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09d262daa/c224c7647cdc41df8575be01c2977bff/FLAG0f0cc22cb [2020-07-20 05:44:43,918 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09d262daa/c224c7647cdc41df8575be01c2977bff [2020-07-20 05:44:43,929 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 05:44:43,933 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 05:44:43,934 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 05:44:43,934 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 05:44:43,939 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 05:44:43,940 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:44:43" (1/1) ... [2020-07-20 05:44:43,944 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2feca620 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:44:43, skipping insertion in model container [2020-07-20 05:44:43,944 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:44:43" (1/1) ... [2020-07-20 05:44:43,954 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 05:44:43,972 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 05:44:44,154 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 05:44:44,157 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 05:44:44,171 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 05:44:44,183 INFO L208 MainTranslator]: Completed translation [2020-07-20 05:44:44,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:44:44 WrapperNode [2020-07-20 05:44:44,184 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 05:44:44,184 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 05:44:44,184 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 05:44:44,184 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 05:44:44,195 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:44:44" (1/1) ... [2020-07-20 05:44:44,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:44:44" (1/1) ... [2020-07-20 05:44:44,200 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:44:44" (1/1) ... [2020-07-20 05:44:44,200 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:44:44" (1/1) ... [2020-07-20 05:44:44,204 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:44:44" (1/1) ... [2020-07-20 05:44:44,206 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:44:44" (1/1) ... [2020-07-20 05:44:44,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:44:44" (1/1) ... [2020-07-20 05:44:44,208 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 05:44:44,209 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 05:44:44,209 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 05:44:44,209 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 05:44:44,210 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:44:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 05:44:44,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 05:44:44,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 05:44:44,348 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-07-20 05:44:44,349 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 05:44:44,349 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 05:44:44,349 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-07-20 05:44:44,349 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 05:44:44,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 05:44:44,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 05:44:44,533 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 05:44:44,534 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 05:44:44,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:44:44 BoogieIcfgContainer [2020-07-20 05:44:44,538 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 05:44:44,540 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 05:44:44,540 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 05:44:44,544 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 05:44:44,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:44:43" (1/3) ... [2020-07-20 05:44:44,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3214de6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:44:44, skipping insertion in model container [2020-07-20 05:44:44,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:44:44" (2/3) ... [2020-07-20 05:44:44,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3214de6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:44:44, skipping insertion in model container [2020-07-20 05:44:44,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:44:44" (3/3) ... [2020-07-20 05:44:44,548 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_20x0-2.c [2020-07-20 05:44:44,560 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 05:44:44,569 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 05:44:44,591 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 05:44:44,621 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 05:44:44,621 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 05:44:44,622 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 05:44:44,622 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 05:44:44,622 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 05:44:44,622 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 05:44:44,623 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 05:44:44,623 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 05:44:44,649 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-20 05:44:44,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 05:44:44,666 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:44:44,668 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:44:44,669 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:44:44,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:44:44,678 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-07-20 05:44:44,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:44:44,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170608172] [2020-07-20 05:44:44,691 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7adcd7ed [2020-07-20 05:44:44,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:44,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:44,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:44:44,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170608172] [2020-07-20 05:44:44,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:44:44,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 05:44:44,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048482497] [2020-07-20 05:44:44,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 05:44:44,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:44:44,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 05:44:44,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 05:44:44,931 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-20 05:44:45,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:44:45,029 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-20 05:44:45,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 05:44:45,031 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 05:44:45,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:44:45,042 INFO L225 Difference]: With dead ends: 30 [2020-07-20 05:44:45,042 INFO L226 Difference]: Without dead ends: 18 [2020-07-20 05:44:45,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 05:44:45,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-20 05:44:45,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-20 05:44:45,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-20 05:44:45,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-20 05:44:45,090 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-20 05:44:45,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:44:45,091 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-20 05:44:45,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 05:44:45,091 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-20 05:44:45,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 05:44:45,093 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:44:45,094 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:44:45,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 05:44:45,095 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:44:45,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:44:45,095 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-07-20 05:44:45,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:44:45,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626199073] [2020-07-20 05:44:45,096 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7adcd7ed [2020-07-20 05:44:45,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:45,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:45,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:45,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:45,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 05:44:45,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626199073] [2020-07-20 05:44:45,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317820609] [2020-07-20 05:44:45,240 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@60d0bde7 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:45,287 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@60d0bde7 issued 2 check-sat command(s) [2020-07-20 05:44:45,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:44:45,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 05:44:45,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:44:45,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 05:44:45,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:44:45,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-07-20 05:44:45,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700159035] [2020-07-20 05:44:45,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 05:44:45,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:44:45,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 05:44:45,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 05:44:45,361 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-07-20 05:44:45,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:44:45,429 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-20 05:44:45,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 05:44:45,429 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-07-20 05:44:45,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:44:45,431 INFO L225 Difference]: With dead ends: 25 [2020-07-20 05:44:45,431 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 05:44:45,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-07-20 05:44:45,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 05:44:45,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-20 05:44:45,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 05:44:45,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-20 05:44:45,439 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-07-20 05:44:45,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:44:45,440 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-20 05:44:45,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 05:44:45,440 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-20 05:44:45,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 05:44:45,441 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:44:45,442 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:44:45,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-20 05:44:45,658 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:44:45,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:44:45,659 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-07-20 05:44:45,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:44:45,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760262970] [2020-07-20 05:44:45,660 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7adcd7ed [2020-07-20 05:44:45,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:45,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:45,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:45,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:45,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:45,788 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 05:44:45,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760262970] [2020-07-20 05:44:45,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125639955] [2020-07-20 05:44:45,789 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@68d4ff4b No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:45,827 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@68d4ff4b issued 2 check-sat command(s) [2020-07-20 05:44:45,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:44:45,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 05:44:45,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:44:45,861 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 05:44:45,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:44:45,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-07-20 05:44:45,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4379171] [2020-07-20 05:44:45,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 05:44:45,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:44:45,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 05:44:45,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-20 05:44:45,864 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 8 states. [2020-07-20 05:44:45,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:44:45,948 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-20 05:44:45,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 05:44:45,949 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-07-20 05:44:45,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:44:45,950 INFO L225 Difference]: With dead ends: 28 [2020-07-20 05:44:45,950 INFO L226 Difference]: Without dead ends: 24 [2020-07-20 05:44:45,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-07-20 05:44:45,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-20 05:44:45,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-20 05:44:45,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-20 05:44:45,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-20 05:44:45,958 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-07-20 05:44:45,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:44:45,959 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-20 05:44:45,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 05:44:45,959 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-20 05:44:45,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 05:44:45,960 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:44:45,961 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:44:46,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:46,175 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:44:46,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:44:46,176 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-07-20 05:44:46,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:44:46,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814541355] [2020-07-20 05:44:46,177 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7adcd7ed [2020-07-20 05:44:46,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:46,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:46,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:46,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:46,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:46,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:46,338 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 05:44:46,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814541355] [2020-07-20 05:44:46,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047278491] [2020-07-20 05:44:46,340 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@227037ed No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:46,374 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@227037ed issued 2 check-sat command(s) [2020-07-20 05:44:46,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:44:46,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 05:44:46,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:44:46,409 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 05:44:46,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:44:46,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-07-20 05:44:46,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959055320] [2020-07-20 05:44:46,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 05:44:46,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:44:46,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 05:44:46,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-20 05:44:46,411 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 9 states. [2020-07-20 05:44:46,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:44:46,489 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-07-20 05:44:46,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 05:44:46,490 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-07-20 05:44:46,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:44:46,491 INFO L225 Difference]: With dead ends: 31 [2020-07-20 05:44:46,491 INFO L226 Difference]: Without dead ends: 27 [2020-07-20 05:44:46,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-07-20 05:44:46,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-20 05:44:46,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-20 05:44:46,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 05:44:46,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-20 05:44:46,498 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-07-20 05:44:46,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:44:46,499 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-20 05:44:46,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 05:44:46,499 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-20 05:44:46,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 05:44:46,500 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:44:46,501 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:44:46,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:46,717 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:44:46,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:44:46,718 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2020-07-20 05:44:46,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:44:46,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692868227] [2020-07-20 05:44:46,719 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7adcd7ed [2020-07-20 05:44:46,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:46,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:46,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:46,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:46,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:46,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:46,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:46,932 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-20 05:44:46,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692868227] [2020-07-20 05:44:46,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273855564] [2020-07-20 05:44:46,933 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3cdee893 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:46,976 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3cdee893 issued 2 check-sat command(s) [2020-07-20 05:44:46,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:44:46,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 05:44:46,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:44:47,009 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-20 05:44:47,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:44:47,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-07-20 05:44:47,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195855122] [2020-07-20 05:44:47,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 05:44:47,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:44:47,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 05:44:47,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-07-20 05:44:47,012 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 10 states. [2020-07-20 05:44:47,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:44:47,111 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-07-20 05:44:47,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 05:44:47,112 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-07-20 05:44:47,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:44:47,113 INFO L225 Difference]: With dead ends: 34 [2020-07-20 05:44:47,113 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 05:44:47,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-07-20 05:44:47,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 05:44:47,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-20 05:44:47,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 05:44:47,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-07-20 05:44:47,121 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-07-20 05:44:47,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:44:47,121 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-07-20 05:44:47,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 05:44:47,121 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-07-20 05:44:47,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-20 05:44:47,123 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:44:47,123 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:44:47,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:47,339 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:44:47,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:44:47,340 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2020-07-20 05:44:47,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:44:47,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182900185] [2020-07-20 05:44:47,341 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7adcd7ed [2020-07-20 05:44:47,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:47,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:47,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:47,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:47,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:47,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:47,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:47,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:47,578 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-20 05:44:47,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182900185] [2020-07-20 05:44:47,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210051829] [2020-07-20 05:44:47,580 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@43e0a732 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:47,619 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@43e0a732 issued 2 check-sat command(s) [2020-07-20 05:44:47,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:44:47,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 05:44:47,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:44:47,669 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-20 05:44:47,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:44:47,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-07-20 05:44:47,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132716915] [2020-07-20 05:44:47,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 05:44:47,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:44:47,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 05:44:47,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-20 05:44:47,680 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 11 states. [2020-07-20 05:44:47,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:44:47,785 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-07-20 05:44:47,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 05:44:47,785 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-07-20 05:44:47,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:44:47,787 INFO L225 Difference]: With dead ends: 37 [2020-07-20 05:44:47,787 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 05:44:47,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-07-20 05:44:47,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 05:44:47,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-20 05:44:47,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 05:44:47,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-20 05:44:47,794 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-07-20 05:44:47,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:44:47,795 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-20 05:44:47,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 05:44:47,795 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-20 05:44:47,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-20 05:44:47,797 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:44:47,797 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:44:48,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-20 05:44:48,011 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:44:48,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:44:48,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2020-07-20 05:44:48,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:44:48,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001127057] [2020-07-20 05:44:48,013 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7adcd7ed [2020-07-20 05:44:48,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:48,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:48,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:48,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:48,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:48,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:48,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:48,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:48,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:48,280 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-20 05:44:48,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001127057] [2020-07-20 05:44:48,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128559867] [2020-07-20 05:44:48,282 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@57d12ee9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:48,320 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@57d12ee9 issued 2 check-sat command(s) [2020-07-20 05:44:48,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:44:48,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 05:44:48,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:44:48,394 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-20 05:44:48,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:44:48,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-07-20 05:44:48,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575644737] [2020-07-20 05:44:48,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 05:44:48,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:44:48,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 05:44:48,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-07-20 05:44:48,398 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 12 states. [2020-07-20 05:44:48,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:44:48,516 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-07-20 05:44:48,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 05:44:48,517 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-07-20 05:44:48,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:44:48,520 INFO L225 Difference]: With dead ends: 40 [2020-07-20 05:44:48,520 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 05:44:48,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2020-07-20 05:44:48,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 05:44:48,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-20 05:44:48,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 05:44:48,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-20 05:44:48,527 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-07-20 05:44:48,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:44:48,528 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-20 05:44:48,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 05:44:48,528 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-20 05:44:48,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-20 05:44:48,529 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:44:48,529 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:44:48,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:48,740 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:44:48,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:44:48,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2020-07-20 05:44:48,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:44:48,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156880683] [2020-07-20 05:44:48,743 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7adcd7ed [2020-07-20 05:44:48,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:48,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:48,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:48,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:48,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:48,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:48,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:48,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:48,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:48,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:49,012 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-20 05:44:49,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156880683] [2020-07-20 05:44:49,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575631721] [2020-07-20 05:44:49,019 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5d8b6185 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:49,064 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5d8b6185 issued 2 check-sat command(s) [2020-07-20 05:44:49,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:44:49,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 05:44:49,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:44:49,102 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-20 05:44:49,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:44:49,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-07-20 05:44:49,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625662665] [2020-07-20 05:44:49,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 05:44:49,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:44:49,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 05:44:49,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-07-20 05:44:49,105 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 13 states. [2020-07-20 05:44:49,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:44:49,222 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-07-20 05:44:49,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 05:44:49,223 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-07-20 05:44:49,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:44:49,224 INFO L225 Difference]: With dead ends: 43 [2020-07-20 05:44:49,224 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 05:44:49,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2020-07-20 05:44:49,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 05:44:49,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-20 05:44:49,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 05:44:49,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-20 05:44:49,231 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-07-20 05:44:49,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:44:49,232 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-20 05:44:49,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 05:44:49,232 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-20 05:44:49,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-20 05:44:49,233 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:44:49,233 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:44:49,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:49,448 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:44:49,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:44:49,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2020-07-20 05:44:49,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:44:49,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078824299] [2020-07-20 05:44:49,449 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7adcd7ed [2020-07-20 05:44:49,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:49,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:49,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:49,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:49,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:49,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:49,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:49,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:49,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:49,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:49,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:49,695 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-20 05:44:49,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078824299] [2020-07-20 05:44:49,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094456687] [2020-07-20 05:44:49,696 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@78e04838 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:49,737 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@78e04838 issued 2 check-sat command(s) [2020-07-20 05:44:49,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:44:49,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 05:44:49,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:44:49,788 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-20 05:44:49,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:44:49,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-07-20 05:44:49,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100557309] [2020-07-20 05:44:49,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 05:44:49,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:44:49,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 05:44:49,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-07-20 05:44:49,791 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 14 states. [2020-07-20 05:44:49,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:44:49,956 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-07-20 05:44:49,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 05:44:49,956 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2020-07-20 05:44:49,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:44:49,958 INFO L225 Difference]: With dead ends: 46 [2020-07-20 05:44:49,958 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 05:44:49,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2020-07-20 05:44:49,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 05:44:49,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-20 05:44:49,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-20 05:44:49,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-07-20 05:44:49,966 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-07-20 05:44:49,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:44:49,967 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-07-20 05:44:49,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 05:44:49,967 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-07-20 05:44:49,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-20 05:44:49,968 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:44:49,969 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:44:50,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-20 05:44:50,177 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:44:50,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:44:50,178 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2020-07-20 05:44:50,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:44:50,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095729476] [2020-07-20 05:44:50,179 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7adcd7ed [2020-07-20 05:44:50,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:50,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:50,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:50,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:50,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:50,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:50,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:50,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:50,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:50,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:50,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:50,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:50,528 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-20 05:44:50,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095729476] [2020-07-20 05:44:50,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746107127] [2020-07-20 05:44:50,529 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@44a1d20 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:50,567 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@44a1d20 issued 2 check-sat command(s) [2020-07-20 05:44:50,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:44:50,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 05:44:50,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:44:50,606 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-20 05:44:50,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:44:50,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-07-20 05:44:50,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344577326] [2020-07-20 05:44:50,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 05:44:50,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:44:50,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 05:44:50,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-07-20 05:44:50,609 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 15 states. [2020-07-20 05:44:50,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:44:50,757 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-07-20 05:44:50,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 05:44:50,757 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-07-20 05:44:50,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:44:50,759 INFO L225 Difference]: With dead ends: 49 [2020-07-20 05:44:50,759 INFO L226 Difference]: Without dead ends: 45 [2020-07-20 05:44:50,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2020-07-20 05:44:50,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-20 05:44:50,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-20 05:44:50,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 05:44:50,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-07-20 05:44:50,766 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-07-20 05:44:50,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:44:50,767 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-07-20 05:44:50,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 05:44:50,767 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-07-20 05:44:50,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-20 05:44:50,768 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:44:50,768 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:44:50,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:50,983 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:44:50,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:44:50,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2020-07-20 05:44:50,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:44:50,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87611256] [2020-07-20 05:44:50,984 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7adcd7ed [2020-07-20 05:44:51,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:51,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:51,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:51,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:51,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:51,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:51,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:51,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:51,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:51,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:51,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:51,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:51,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:51,433 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-20 05:44:51,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87611256] [2020-07-20 05:44:51,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119858360] [2020-07-20 05:44:51,434 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@670b06b2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:51,485 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@670b06b2 issued 2 check-sat command(s) [2020-07-20 05:44:51,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:44:51,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-20 05:44:51,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:44:51,523 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-20 05:44:51,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:44:51,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-07-20 05:44:51,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932807655] [2020-07-20 05:44:51,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 05:44:51,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:44:51,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 05:44:51,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-07-20 05:44:51,526 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 16 states. [2020-07-20 05:44:51,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:44:51,683 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-07-20 05:44:51,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 05:44:51,684 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 73 [2020-07-20 05:44:51,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:44:51,686 INFO L225 Difference]: With dead ends: 52 [2020-07-20 05:44:51,686 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 05:44:51,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=250, Invalid=452, Unknown=0, NotChecked=0, Total=702 [2020-07-20 05:44:51,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 05:44:51,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-20 05:44:51,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 05:44:51,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-07-20 05:44:51,703 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-07-20 05:44:51,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:44:51,704 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-07-20 05:44:51,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 05:44:51,704 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-07-20 05:44:51,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-20 05:44:51,709 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:44:51,709 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:44:51,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:51,922 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:44:51,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:44:51,922 INFO L82 PathProgramCache]: Analyzing trace with hash -2010530748, now seen corresponding path program 11 times [2020-07-20 05:44:51,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:44:51,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432910302] [2020-07-20 05:44:51,923 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7adcd7ed [2020-07-20 05:44:51,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:51,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:51,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:52,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:52,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:52,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:52,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:52,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:52,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:52,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:52,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:52,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:52,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:52,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:52,341 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-20 05:44:52,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432910302] [2020-07-20 05:44:52,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623832305] [2020-07-20 05:44:52,342 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@a639cec No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:52,397 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@a639cec issued 2 check-sat command(s) [2020-07-20 05:44:52,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:44:52,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 05:44:52,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:44:52,446 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-20 05:44:52,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:44:52,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-07-20 05:44:52,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520854571] [2020-07-20 05:44:52,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 05:44:52,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:44:52,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 05:44:52,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-07-20 05:44:52,449 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 17 states. [2020-07-20 05:44:52,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:44:52,619 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-07-20 05:44:52,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 05:44:52,619 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 79 [2020-07-20 05:44:52,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:44:52,621 INFO L225 Difference]: With dead ends: 55 [2020-07-20 05:44:52,621 INFO L226 Difference]: Without dead ends: 51 [2020-07-20 05:44:52,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2020-07-20 05:44:52,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-20 05:44:52,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-07-20 05:44:52,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 05:44:52,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-07-20 05:44:52,633 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-07-20 05:44:52,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:44:52,634 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-07-20 05:44:52,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 05:44:52,634 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-07-20 05:44:52,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-20 05:44:52,635 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:44:52,635 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:44:52,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-07-20 05:44:52,850 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:44:52,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:44:52,850 INFO L82 PathProgramCache]: Analyzing trace with hash -986521316, now seen corresponding path program 12 times [2020-07-20 05:44:52,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:44:52,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049638323] [2020-07-20 05:44:52,851 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7adcd7ed [2020-07-20 05:44:52,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:52,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:52,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:52,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:52,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:53,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:53,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:53,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:53,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:53,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:53,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:53,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:53,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:53,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:53,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:53,316 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-20 05:44:53,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049638323] [2020-07-20 05:44:53,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806674579] [2020-07-20 05:44:53,317 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5b7bface No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:53,368 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5b7bface issued 2 check-sat command(s) [2020-07-20 05:44:53,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:44:53,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-20 05:44:53,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:44:53,408 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-20 05:44:53,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:44:53,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-07-20 05:44:53,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421890543] [2020-07-20 05:44:53,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 05:44:53,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:44:53,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 05:44:53,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-07-20 05:44:53,411 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 18 states. [2020-07-20 05:44:53,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:44:53,597 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-07-20 05:44:53,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 05:44:53,597 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2020-07-20 05:44:53,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:44:53,599 INFO L225 Difference]: With dead ends: 58 [2020-07-20 05:44:53,599 INFO L226 Difference]: Without dead ends: 54 [2020-07-20 05:44:53,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=333, Invalid=597, Unknown=0, NotChecked=0, Total=930 [2020-07-20 05:44:53,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-20 05:44:53,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-07-20 05:44:53,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-20 05:44:53,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-07-20 05:44:53,608 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-07-20 05:44:53,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:44:53,608 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-07-20 05:44:53,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 05:44:53,608 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-07-20 05:44:53,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-07-20 05:44:53,609 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:44:53,609 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:44:53,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-20 05:44:53,810 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:44:53,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:44:53,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1073897604, now seen corresponding path program 13 times [2020-07-20 05:44:53,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:44:53,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219863847] [2020-07-20 05:44:53,812 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7adcd7ed [2020-07-20 05:44:53,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:53,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:53,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:53,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:53,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:54,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:54,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:54,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:54,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:54,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:54,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:54,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:54,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:54,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:54,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:54,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:54,474 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-20 05:44:54,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219863847] [2020-07-20 05:44:54,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153951455] [2020-07-20 05:44:54,475 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ecf6351 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:54,539 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ecf6351 issued 2 check-sat command(s) [2020-07-20 05:44:54,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:44:54,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-20 05:44:54,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:44:54,590 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-20 05:44:54,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:44:54,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-07-20 05:44:54,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016699222] [2020-07-20 05:44:54,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 05:44:54,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:44:54,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 05:44:54,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2020-07-20 05:44:54,594 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 19 states. [2020-07-20 05:44:54,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:44:54,803 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-07-20 05:44:54,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 05:44:54,803 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 91 [2020-07-20 05:44:54,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:44:54,804 INFO L225 Difference]: With dead ends: 61 [2020-07-20 05:44:54,804 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 05:44:54,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=379, Invalid=677, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 05:44:54,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 05:44:54,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-20 05:44:54,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 05:44:54,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-07-20 05:44:54,820 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-07-20 05:44:54,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:44:54,820 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-07-20 05:44:54,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 05:44:54,820 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-07-20 05:44:54,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-07-20 05:44:54,822 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:44:54,822 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:44:55,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-20 05:44:55,038 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:44:55,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:44:55,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1572648100, now seen corresponding path program 14 times [2020-07-20 05:44:55,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:44:55,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740980346] [2020-07-20 05:44:55,039 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7adcd7ed [2020-07-20 05:44:55,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:55,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:55,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:55,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:55,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:55,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:55,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:55,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:55,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:55,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:55,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:55,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:55,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:55,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:55,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:55,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:55,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:55,654 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-07-20 05:44:55,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740980346] [2020-07-20 05:44:55,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493248437] [2020-07-20 05:44:55,655 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@70ab0fe No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:55,704 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@70ab0fe issued 2 check-sat command(s) [2020-07-20 05:44:55,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:44:55,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-20 05:44:55,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:44:55,755 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-07-20 05:44:55,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:44:55,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-07-20 05:44:55,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797978886] [2020-07-20 05:44:55,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 05:44:55,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:44:55,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 05:44:55,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-07-20 05:44:55,760 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 20 states. [2020-07-20 05:44:55,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:44:55,976 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-07-20 05:44:55,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 05:44:55,977 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 97 [2020-07-20 05:44:55,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:44:55,978 INFO L225 Difference]: With dead ends: 64 [2020-07-20 05:44:55,978 INFO L226 Difference]: Without dead ends: 60 [2020-07-20 05:44:55,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=428, Invalid=762, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 05:44:55,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-20 05:44:55,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-07-20 05:44:55,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 05:44:55,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-07-20 05:44:55,986 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-07-20 05:44:55,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:44:55,987 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-07-20 05:44:55,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 05:44:55,987 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-07-20 05:44:55,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-07-20 05:44:55,988 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:44:55,988 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:44:56,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:56,201 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:44:56,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:44:56,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1584030916, now seen corresponding path program 15 times [2020-07-20 05:44:56,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:44:56,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669305084] [2020-07-20 05:44:56,202 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7adcd7ed [2020-07-20 05:44:56,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:56,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:56,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:56,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:56,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:56,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:56,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:56,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:56,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:56,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:56,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:56,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:56,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:56,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:56,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:56,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:56,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:56,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:56,859 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-20 05:44:56,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669305084] [2020-07-20 05:44:56,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411170000] [2020-07-20 05:44:56,860 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5f148aee No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:56,925 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5f148aee issued 2 check-sat command(s) [2020-07-20 05:44:56,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:44:56,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 34 conjunts are in the unsatisfiable core [2020-07-20 05:44:56,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:44:56,968 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-20 05:44:56,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:44:56,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-07-20 05:44:56,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196078137] [2020-07-20 05:44:56,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 05:44:56,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:44:56,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 05:44:56,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2020-07-20 05:44:56,971 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 21 states. [2020-07-20 05:44:57,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:44:57,210 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-07-20 05:44:57,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 05:44:57,210 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 103 [2020-07-20 05:44:57,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:44:57,212 INFO L225 Difference]: With dead ends: 67 [2020-07-20 05:44:57,212 INFO L226 Difference]: Without dead ends: 63 [2020-07-20 05:44:57,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=480, Invalid=852, Unknown=0, NotChecked=0, Total=1332 [2020-07-20 05:44:57,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-20 05:44:57,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-07-20 05:44:57,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-20 05:44:57,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-07-20 05:44:57,219 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-07-20 05:44:57,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:44:57,220 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-07-20 05:44:57,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 05:44:57,220 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-07-20 05:44:57,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-20 05:44:57,221 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:44:57,222 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:44:57,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-07-20 05:44:57,437 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:44:57,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:44:57,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1066046876, now seen corresponding path program 16 times [2020-07-20 05:44:57,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:44:57,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491650396] [2020-07-20 05:44:57,438 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7adcd7ed [2020-07-20 05:44:57,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:57,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:57,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:57,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:57,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:57,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:57,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:57,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:57,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:57,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:57,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:57,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:57,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:57,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:57,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:57,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:57,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:57,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:57,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:58,120 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-07-20 05:44:58,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491650396] [2020-07-20 05:44:58,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406911000] [2020-07-20 05:44:58,121 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1213b592 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:58,185 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1213b592 issued 2 check-sat command(s) [2020-07-20 05:44:58,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:44:58,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 36 conjunts are in the unsatisfiable core [2020-07-20 05:44:58,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:44:58,276 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-07-20 05:44:58,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:44:58,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-07-20 05:44:58,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453487994] [2020-07-20 05:44:58,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 05:44:58,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:44:58,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 05:44:58,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2020-07-20 05:44:58,289 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 22 states. [2020-07-20 05:44:58,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:44:58,562 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-07-20 05:44:58,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-20 05:44:58,562 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 109 [2020-07-20 05:44:58,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:44:58,564 INFO L225 Difference]: With dead ends: 70 [2020-07-20 05:44:58,564 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 05:44:58,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=535, Invalid=947, Unknown=0, NotChecked=0, Total=1482 [2020-07-20 05:44:58,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 05:44:58,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-07-20 05:44:58,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-20 05:44:58,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-07-20 05:44:58,576 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2020-07-20 05:44:58,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:44:58,576 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-07-20 05:44:58,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 05:44:58,576 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-07-20 05:44:58,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-07-20 05:44:58,579 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:44:58,579 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:44:58,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-07-20 05:44:58,780 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:44:58,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:44:58,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1300351236, now seen corresponding path program 17 times [2020-07-20 05:44:58,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:44:58,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314385107] [2020-07-20 05:44:58,782 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7adcd7ed [2020-07-20 05:44:58,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:58,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:58,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:58,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:58,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:58,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:59,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:59,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:59,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:59,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:59,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:59,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:59,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:59,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:59,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:59,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:59,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:59,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:59,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:59,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:59,631 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-07-20 05:44:59,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314385107] [2020-07-20 05:44:59,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164394009] [2020-07-20 05:44:59,632 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7382b3af No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:59,695 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7382b3af issued 2 check-sat command(s) [2020-07-20 05:44:59,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:44:59,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 38 conjunts are in the unsatisfiable core [2020-07-20 05:44:59,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:44:59,743 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-07-20 05:44:59,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:44:59,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-07-20 05:44:59,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765587223] [2020-07-20 05:44:59,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 05:44:59,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:44:59,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 05:44:59,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2020-07-20 05:44:59,745 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 23 states. [2020-07-20 05:45:00,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:45:00,079 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-07-20 05:45:00,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-20 05:45:00,079 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 115 [2020-07-20 05:45:00,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:45:00,080 INFO L225 Difference]: With dead ends: 73 [2020-07-20 05:45:00,080 INFO L226 Difference]: Without dead ends: 69 [2020-07-20 05:45:00,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=593, Invalid=1047, Unknown=0, NotChecked=0, Total=1640 [2020-07-20 05:45:00,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-20 05:45:00,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-07-20 05:45:00,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-20 05:45:00,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-07-20 05:45:00,086 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2020-07-20 05:45:00,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:45:00,087 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-07-20 05:45:00,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 05:45:00,087 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-07-20 05:45:00,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-20 05:45:00,088 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:45:00,089 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:45:00,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-07-20 05:45:00,302 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:45:00,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:45:00,302 INFO L82 PathProgramCache]: Analyzing trace with hash 227065820, now seen corresponding path program 18 times [2020-07-20 05:45:00,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:45:00,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007655781] [2020-07-20 05:45:00,303 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7adcd7ed [2020-07-20 05:45:00,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:00,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:00,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:00,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:00,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:00,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:00,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:00,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:00,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:00,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:00,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:00,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:00,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:00,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:00,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:00,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:00,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:00,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:00,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:01,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:01,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:01,151 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-07-20 05:45:01,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007655781] [2020-07-20 05:45:01,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249967176] [2020-07-20 05:45:01,152 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@107a6a87 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:45:01,215 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@107a6a87 issued 2 check-sat command(s) [2020-07-20 05:45:01,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:45:01,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 40 conjunts are in the unsatisfiable core [2020-07-20 05:45:01,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:45:01,264 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-07-20 05:45:01,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:45:01,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-07-20 05:45:01,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288577125] [2020-07-20 05:45:01,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 05:45:01,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:45:01,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 05:45:01,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=335, Unknown=0, NotChecked=0, Total=552 [2020-07-20 05:45:01,267 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 24 states. [2020-07-20 05:45:01,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:45:01,594 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-07-20 05:45:01,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 05:45:01,594 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 121 [2020-07-20 05:45:01,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:45:01,595 INFO L225 Difference]: With dead ends: 76 [2020-07-20 05:45:01,595 INFO L226 Difference]: Without dead ends: 72 [2020-07-20 05:45:01,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=654, Invalid=1152, Unknown=0, NotChecked=0, Total=1806 [2020-07-20 05:45:01,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-20 05:45:01,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-07-20 05:45:01,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-20 05:45:01,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-07-20 05:45:01,601 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2020-07-20 05:45:01,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:45:01,602 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-07-20 05:45:01,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 05:45:01,602 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-07-20 05:45:01,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-07-20 05:45:01,603 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:45:01,604 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:45:01,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:45:01,817 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:45:01,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:45:01,817 INFO L82 PathProgramCache]: Analyzing trace with hash -479687356, now seen corresponding path program 19 times [2020-07-20 05:45:01,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:45:01,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585009327] [2020-07-20 05:45:01,818 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7adcd7ed [2020-07-20 05:45:01,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:01,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:01,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:01,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:01,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:02,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:02,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:02,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:02,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:02,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:02,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:02,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:02,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:02,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:02,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:02,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:02,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:02,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:02,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:02,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:02,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:02,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:02,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-07-20 05:45:02,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585009327] [2020-07-20 05:45:02,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785027373] [2020-07-20 05:45:02,977 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e7cdba4 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:45:03,076 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e7cdba4 issued 2 check-sat command(s) [2020-07-20 05:45:03,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:45:03,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 42 conjunts are in the unsatisfiable core [2020-07-20 05:45:03,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:45:03,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-07-20 05:45:03,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:45:03,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-07-20 05:45:03,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983074667] [2020-07-20 05:45:03,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 05:45:03,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:45:03,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 05:45:03,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=362, Unknown=0, NotChecked=0, Total=600 [2020-07-20 05:45:03,182 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 25 states. [2020-07-20 05:45:03,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:45:03,665 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-07-20 05:45:03,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 05:45:03,665 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 127 [2020-07-20 05:45:03,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:45:03,667 INFO L225 Difference]: With dead ends: 79 [2020-07-20 05:45:03,667 INFO L226 Difference]: Without dead ends: 75 [2020-07-20 05:45:03,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=718, Invalid=1262, Unknown=0, NotChecked=0, Total=1980 [2020-07-20 05:45:03,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-20 05:45:03,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-07-20 05:45:03,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-20 05:45:03,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-07-20 05:45:03,685 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2020-07-20 05:45:03,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:45:03,685 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-07-20 05:45:03,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 05:45:03,686 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-07-20 05:45:03,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-07-20 05:45:03,688 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:45:03,689 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:45:03,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:45:03,906 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:45:03,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:45:03,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1598174692, now seen corresponding path program 20 times [2020-07-20 05:45:03,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:45:03,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210265569] [2020-07-20 05:45:03,907 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7adcd7ed [2020-07-20 05:45:03,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:04,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:04,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:04,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:04,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:04,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:04,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:04,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:04,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:04,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:05,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:05,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:05,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:05,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:05,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:05,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:05,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:05,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:05,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:05,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:06,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:06,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:06,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:06,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 589 proven. 40 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2020-07-20 05:45:06,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210265569] [2020-07-20 05:45:06,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960256021] [2020-07-20 05:45:06,528 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4c52ad74 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:45:06,598 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4c52ad74 issued 4 check-sat command(s) [2020-07-20 05:45:06,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:45:06,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 177 conjunts are in the unsatisfiable core [2020-07-20 05:45:06,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:45:10,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 39 proven. 610 refuted. 0 times theorem prover too weak. 571 trivial. 0 not checked. [2020-07-20 05:45:10,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:45:10,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 49] total 94 [2020-07-20 05:45:10,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699704560] [2020-07-20 05:45:10,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2020-07-20 05:45:10,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:45:10,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2020-07-20 05:45:10,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=580, Invalid=8162, Unknown=0, NotChecked=0, Total=8742 [2020-07-20 05:45:10,078 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 94 states. [2020-07-20 05:45:15,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:45:15,953 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2020-07-20 05:45:15,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-07-20 05:45:15,954 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 133 [2020-07-20 05:45:15,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:45:15,954 INFO L225 Difference]: With dead ends: 78 [2020-07-20 05:45:15,955 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 05:45:15,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3521 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=1382, Invalid=17250, Unknown=0, NotChecked=0, Total=18632 [2020-07-20 05:45:15,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 05:45:15,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 05:45:15,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 05:45:15,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 05:45:15,961 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 133 [2020-07-20 05:45:15,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:45:15,961 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 05:45:15,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 94 states. [2020-07-20 05:45:15,961 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 05:45:15,961 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 05:45:16,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-07-20 05:45:16,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 05:45:16,195 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 05:45:16,195 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 05:45:16,195 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 05:45:16,196 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 05:45:16,196 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 05:45:16,196 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 05:45:16,196 INFO L268 CegarLoopResult]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2020-07-20 05:45:16,196 INFO L264 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (and (= sum_~m |sum_#in~m|) (= sum_~n |sum_#in~n|) (<= 1 sum_~n)) [2020-07-20 05:45:16,196 INFO L268 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2020-07-20 05:45:16,196 INFO L268 CegarLoopResult]: For program point L4(lines 4 8) no Hoare annotation was computed. [2020-07-20 05:45:16,196 INFO L268 CegarLoopResult]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2020-07-20 05:45:16,197 INFO L271 CegarLoopResult]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2020-07-20 05:45:16,197 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-07-20 05:45:16,197 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2020-07-20 05:45:16,197 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2020-07-20 05:45:16,197 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-07-20 05:45:16,197 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-07-20 05:45:16,198 INFO L264 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (= 20 main_~a~0) [2020-07-20 05:45:16,198 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-07-20 05:45:16,198 INFO L268 CegarLoopResult]: For program point L15-2(lines 11 18) no Hoare annotation was computed. [2020-07-20 05:45:16,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:45:16 BoogieIcfgContainer [2020-07-20 05:45:16,206 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 05:45:16,210 INFO L168 Benchmark]: Toolchain (without parser) took 32277.44 ms. Allocated memory was 137.4 MB in the beginning and 620.8 MB in the end (delta: 483.4 MB). Free memory was 101.1 MB in the beginning and 314.1 MB in the end (delta: -213.0 MB). Peak memory consumption was 270.4 MB. Max. memory is 7.1 GB. [2020-07-20 05:45:16,211 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 137.4 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 05:45:16,211 INFO L168 Benchmark]: CACSL2BoogieTranslator took 249.74 ms. Allocated memory is still 137.4 MB. Free memory was 100.7 MB in the beginning and 91.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-20 05:45:16,219 INFO L168 Benchmark]: Boogie Preprocessor took 24.19 ms. Allocated memory is still 137.4 MB. Free memory was 91.1 MB in the beginning and 89.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-20 05:45:16,219 INFO L168 Benchmark]: RCFGBuilder took 329.86 ms. Allocated memory was 137.4 MB in the beginning and 201.3 MB in the end (delta: 64.0 MB). Free memory was 89.7 MB in the beginning and 169.2 MB in the end (delta: -79.5 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-07-20 05:45:16,220 INFO L168 Benchmark]: TraceAbstraction took 31666.76 ms. Allocated memory was 201.3 MB in the beginning and 620.8 MB in the end (delta: 419.4 MB). Free memory was 169.2 MB in the beginning and 314.1 MB in the end (delta: -144.9 MB). Peak memory consumption was 274.5 MB. Max. memory is 7.1 GB. [2020-07-20 05:45:16,224 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 137.4 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 249.74 ms. Allocated memory is still 137.4 MB. Free memory was 100.7 MB in the beginning and 91.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.19 ms. Allocated memory is still 137.4 MB. Free memory was 91.1 MB in the beginning and 89.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 329.86 ms. Allocated memory was 137.4 MB in the beginning and 201.3 MB in the end (delta: 64.0 MB). Free memory was 89.7 MB in the beginning and 169.2 MB in the end (delta: -79.5 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 31666.76 ms. Allocated memory was 201.3 MB in the beginning and 620.8 MB in the end (delta: 419.4 MB). Free memory was 169.2 MB in the beginning and 314.1 MB in the end (delta: -144.9 MB). Peak memory consumption was 274.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 31.5s, OverallIterations: 21, TraceHistogramMax: 21, AutomataDifference: 9.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 272 SDtfs, 930 SDslu, 2559 SDs, 0 SdLazy, 3422 SolverSat, 314 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2574 GetRequests, 1960 SyntacticMatches, 0 SemanticMatches, 614 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6181 ImplicationChecksByTransitivity, 13.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 21 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 18 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 15.4s InterpolantComputationTime, 3053 NumberOfCodeBlocks, 2378 NumberOfCodeBlocksAsserted, 63 NumberOfCheckSat, 3012 ConstructedInterpolants, 0 QuantifiedInterpolants, 850980 SizeOfPredicates, 254 NumberOfNonLiveVariables, 3540 ConjunctsInSsa, 633 ConjunctsInUnsatCore, 41 InterpolantComputations, 1 PerfectInterpolantSequences, 9390/17640 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...